Seed immunizing medium



Patented Aug. 14, 1934 1,969,857 scan momma MEDIUM Wilhelm Schepss, Wilhelm Bonrath and Karl Taube, Leverkusen, Germany, aaaignore to Winthrop Chemical Company, 1110., New York, N. Y., a corporation of New York No Drawing. Application August 20, 1928, Serial No. 300,974. In Germany September 22, 1927 7 Claims. (01. 167-38) The present invention relates to new seed im- Ezampla-A mixture of o-chlorophenylmunizing media. curic acetate 01' the probable formula More particularly it relates to new seed immunizing media substantially identical with 5 mercury compounds of aromatic hydrocarbons c1 55 containing the mercury linked to the nucleus of the following general formula: n -ooc-cm R-Hg--A' wherein R represents the residue of a compound with such a quantltyof talc as to yield a mercury 60 of the group comprising aromatic hydrocarbons content of 1.5% is dusted upon rye-seed infected substituted by substituents of an indiiferent, by fusarium in a proportion of 2:1000. 84% of, character. A stands for the residue of a comthe rye-seed thus treated germinated, only 1% pound of the group comprising organic and inof the plants being infected whereas, when soworganic acids, for instance, such as OOC.CH3, ing the untreated rye only 71% germinated, 5.

00C CH(OH) CH3, O.NO2, -O.S0aH, of the plants being infected.

Cl, CN. Mercury compounds of this kind are, Similar results will be obtained when replacing for. example, phenyl-mercurlc acetate (Journ.Am. .the o-chloro-phenyl-mercuric acetate by 0- Chem. Soc. 46' (19243, 1510,) o-chloro-phenylchlorophenyl-mercuric-chloride, -cya.nide, -lac- 20 mercuric chloride, -n'itrate, -cyanide chromate tate, anisyl-mercuric acetate e. a. 7o,

lactate (obtainable fo instance by treating We claim:- o chloro-phenylmercuric acetate with sodium l. Aseed immunizing medium essentially comchloride, potassium or s dium -cyanide, -chroprising a. compound of the general formula. mate e. a.), anisyl-mer uric acetate e. a. The v H 5 mercury compounds'm y be incorporated with V 7 seed crops in any desired manner advantageously z in the presence of a suitable carrier,- and when thus applied constitute valuable media for-diseinfecting and seed crops.

By the term substituents of an indiiferent 80 character we mean such substituents as do not 'in w ch A de tes he r l of an a idand lend to the mercuric com ounds mentioned a, anysubstituentzcof the substituent-bearing benbasic or acid character. Such substituents, are zene nucleus is selected from the roup 01 indiffor instance halogen, the nitro group, alkoxy-, ferent substltuents consisting of halogen, all:- carboxyalkyl-, sulfanilide groups e. 'a. The in-' Y. 'ni ro nd a phatic xy kyl ro p 35 corporating of these compounds with seed grain 2. A seed immunizing d um comprising a "may be performed in different manners; for inco p u 0! h general 1011111118 stance the seed grain may be dusted or otherwise intimately mixed with our immunizing medium 4 40 whereby it maybe of advantage to add to the latter inert diluents, carriers or wetting agents A such as talc metal oxides, -carbonates kiesel- H3- guhr, the sodium salt of isobutyl naphthalene sulfonic acid, activated charcoal e. a., or-to add in which A denotes the radical of an acid of low 45 other disinfecting or immunizing media, f. i. molecular weight selected from-the group con- 9 copper salts, arsenic compounds e. a., and it is to sisting of halogen hydrides and acetic acid and be understood, that also such mixtures are inany substituent a: of the substituent-bearing bentended to be included in our invention. zene nucleus is selected from the group of indif- The following examples illustrate our invenferent substituents consisting of halogen, alkoxy, 5 tion, without limiting it theretozand nitro groups.

3. A seed immunizing medium essentially comprising a compound of the general formula essentially com- 6. A seed immunizing medium essentially comprising a compound of the general formula in which A denotes the radical of an acid of low molecular weight selected from the group consisting of hydrochloric and acetic acids and any substituent :1: cf the substituent-bearing benzene nucleus is a. halogen group.

7. A seed immunizing medium essentially comprising chlorphenyl mercury acetate.

.WILHELM SCHEPSS. IL. 5.] W'ILHELMBONRA'I'H. [I..s.] KARLTAU.BE. [1..s.1 

